Ethernet controller, no high speed internet, computer saying drivers for this device are not installed

Purchased a dell optiplex GX240, tried to hook up my high speed internet, but it wouldnt connect so i tried device manger on the computer, clicked on ethernet controller and its saying "drivers for this device are not installed" when i try to reinstall the drivers, not online cos i'm not connected, it says, "windows could not find software for your device". I'm not computer savvy as i'm sure your well aware by now, but could anyone help me it would be appreciated.
Thanks
Marty

You can find all drivers you need for the Optiplex on Dell's support web site (link).Choose the correct Operating system form the drop-down menu and look under Network. There is a download for the 3Com 3C905C Integrated Network Card, which is hopefully the model in your machine. Download the version for your harddrive and run the executable.Here is the direct link for downloading the file.

If you have any more questions, just come back here and leave a comment - I'm happy to help.

When you purchased the PC the NIC(Network Interface Card) driver should be present in the Mother Board CD. Just run that CD and install the network driver, you can also ask for the MB CD from where you purchased your PC, since it must be still under warranty. Also ask your ISP for the domain address and the gateway too. After that you should be able to get connected to the net..........sodeep

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it is either a driver conflict ? or your sound driver is not installed right ? so install your sound driverin your computer and after installing it reboot to see if it works ? if you still have the problem you may have to change the address of the device ? hope this helps !

If you just updated the driver try this, Click Start, then control panel, then performance and maintenence, then See basic information about your computer, then the hardware tab, then device manager, then sound game and video controllers, then click your sound card (It will normally have audio in the title) then rollback driver. if this is the first driver you've ever had for your sound card follow all of those steps exept the last, and substitute it for update driver. hope this helps, Daniel

there is a software called driver genius which works great for all drivers i had issues with, considering that its a out of date pc you may want to try that software. it costs but theres also a trial. here is the link from dell for the drivers. its a broadcom nic card and i have this exact setup at work in our shipping department so these will work